Simulation engineer in Product Design and Development team (Expert in thermal, fluid, additive mfg., seismic/earthquake, wind, snow, rain, thermal comfort, clouds, plants/trees, building & HVAC simulations)
#FeelTheMesh 2 How much high 🦒 can I go ??? Boundary layer inflation in CFD Selected face: Topmost face Keeping other factors constant, Maximum layers: 2,4,10,100,150,200 ✅ Successful Layer Counts: 2, 4, 10, 100 💻 Successful but high volume count for further computation: 150 ❌ Unsuccessful Layer Counts: 200 Note: Keep growth rate and transition ratio constant Note2: a) Growth rate = next boundary layer cell thickness/ previous boundary layer cell thickness, b) Transition ratio = boundary layer cell thickness in last boundary layer / first cell thickness in volume fill #boundarylayer #ansys #maximumlayers #openfoam #CFD #ComputationalFluidDynamics #Simulation #Engineering #Optimization
Interesting. I agree with Anurag’s comment, you should have no restrictions on the number of prism layers. But I have another question for you: have you tried running the case with the (higher number of prism layer) meshes? How is the pressure solution coming along, as in do you see an adverse impact of the (very) high aspect ratio cells in the first few prism layers? Also, (and pardon my ignorance) what is the difference between growth rate and transition ratio?
Use high no of inflation layers with k epsilon and k-omega.... solution will behaves weirdly and most proabibly will be wrong.. Quality might be low at 100,150 because of very low aspect ratio...
Technocrat with multi-discipline experience in industrial R&D
5moThis doesn't seem right. Computationally there should be no limit on the number of prism layers. It has to do with your prism generation parameters.